Locomotive stoker



March 17, 1931. N LQWER LOCOMOTIYE STOKER Original Filed June 4, 1926 2 Sheets-Sheet 1 \iiflllll L r. L LHNH IL Mart 2h 17, 19 31. LOWER LOCOMOTIVE STOKER Original Filed June 4. 1926 '2 Sheets-Sheet 2 @M MVLQAWS Patented Mar. 17, 1931 UNITED STA-rs -AT'ENT QFFi CE NATHAN M. LOWER, Q13 PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE STANDARD STOKEB COMPANY INC., OF NEW YORK, N. Y., A CORPO- RATION OF DELAWARE LOCOMOTIVE' STOKER.

Application filed J'une 4, 1926, Serial No. 113,800. Renewed September 18, 1929.

The invention relates to the type of stokers in which the fuel is delivered to a distributing nozzle which discharges through the hand firing door opening of the furnace; its objects being to simplify and increase the efli' ciency thereof.

In the accompanying drawings showing preferred forms of the invention Fig. 1 is a detail longitudinal vertical section of a locomotive and its tender, with the improved stoker applied thereto;

Fig. 2 is a sectional detail 011 the line 22 of Fig. 1;

Fig. 3 is a detail plan view on the line 83 of Fig. 1, some parts being shown in section and some portions being broken away;

Fig. 4 is a detail vertical central section through the rear end of the locomotive, showing a modified form of construction;

Fig. 5 is a section on the line 5-5 of Fig. 4; and e V Fig. 6 is a sectional view on the line 6 of Fig. 1. p

The backhead of the locomotive boiler is represented at 10, and the grate bars of its fire-box 11 are shown at 12. The deck or floor of the locomotive cab is represented at 13, and the tender at 14 which is provided with the usual fuel bin 14a.

The stoker comprises a transfer conduit 15, the rear end of which is upwardly open, as usual, for receiving fuel through a suitable aperture in the floor of the fuel bin of the tender. This conduit extends forwardly as a single inflexible unit to the locomotive and under the deck thereof, its forward end being connected, by means of a ball joint 16, with the lower end of the riser section of an in verted L-shaped delivery nozzle 17. The upper end 18 of this nozzle projects into the hand firing opening 19 in the backhead 10, and delivers upon a distributor plate 20 which projects into the fire-box 11 and from which fuel is swept and scattered over the grate 12 bymeans of steam jets issuing from nozzles, as 21. Means for advancing the fuel through the conduit may take the form of a screw, as shown at 22.

The rear end of the conduit 15 is mounted on rollers, as 23, which run on tracks 24 secured to the framing of the tender, thereby providing for the movement of the conduit in all directions incident to relative movements of the locomotive and tender, the ball joint 16 cooperating to this end. The lower leg 25 of the nozzle 17 is preferably rectangular in cross section and Prof erably flares upwardly, its lower end being substantially of the width of the end of the conduit. 15, and its upper end being of the width of the upper section or discharge end 18 of the nozzle, the width of which is approximately that of the door opening 19.

Fuel'delivered into the nozzle from the ransfer conduitisjforced upwardly by the pressure of the advancing element- 22, the

angular form of the riser conduit checking the tendency of the fuel to rotate with the screw 22. The tendency of fuel to pack in a riser conduit through which it is forced by the continued application of the delivering pressure varies with its character and condition. In order to prevent it in all cases a reciprocating lifter is located within the lower end of the nozzle.

In the construction shown in Fig. 1, this I lifter takes the form of a plate 2.6, pivoted adj acent'to the balljoint 16 and swinging upwardly from approximately a horizontal positiona sufficient distance to give the fuel an upward impulse and eifectuallyprevent impacting. The freeend of the plate 26 is provided with a'depending curved skirt 27, which prevents the entrance of fuel back of the plate when the latter is at the end of its upstroke.

i In theconstruction illustrated in Fig. 4, the lifter takes the form of a. plunger 28, conforming in shape to the cross section of the lower end of the riser section of the nozzle 17,

is derived from a crank 30 on a shaft driven a through a suitable train of gears within the driven.

on its upper surface with deflecting ribs, as.

36, for directing some of the fuel into the back corners of the fire-box. Steam is led to the nozzles 21 through pipes, such as 37, which will be suitably connected'to the steam boiler or other source of supply.

The stoker is extremely simple, comprising but few parts, two only of which are power l-Che construction described does not exhaust the forms in which the invention may be embodiedas it is defined in the appended claims.

I claim ,as my invention 1. In a locomotive stoker, in combination,

a fuel delivery nozzle comprising a riser,

angular in cross section, located outside of the fire-box of the locomotive, means for deliver'ing fuel to the lower end of the riser under pressure adequate to raise it to the upper end thereof, and a reciprocating lifter in the lower end of the riser for preventing the impacting of the fuel therein.

2. In a locomotive stoker, in combination, a fuel delivery nozzle comprising a riser, angular in cross section, located outside of the fire-box of the locomotive,-means for delivering fuel to the lower end of the riser under pressure adequate to raise it to the upper end thereof, and a reciprocating plunger in the lower end of the riser for preventing the impacting of the fuel therein.

In a locomotive stoker, in combination, a conduit for conveying .fuel from'thetender to the locomotive, a delivery nozzle comprising a riser section angular in cross section and connected with the conduit by a ball joint, and a delivery section communicating with an aperture in the back-head of the locomotive fire-box, means within the conduit for advancing fuel through the conduit and forcing it through the nozzle, and areciproeating lifter within the lower end of the riser section for preventing the impacting of the fuel therein.

at. In a locomotive stoker, in combination, a transfer conduit, a riser conduit leading upwardly from the delivery end of'the transconduit and having its upward end directed forwardly, a screw within the first named conduit for advancing fuel therethrough and forcing it through the riser, and an oscillatingplate within the lower end of the riser.

5. In combination, a boiler having a firebox, a fuel bin, a .stoker including'a conduit for conducting fuel from said bin to said firebox, a helical screw in said conduit for advancing and forcing the fuel therethrough, said conduit comprising sections arranged at an angle, the forward section mounted exteriorly of and opening forwardly into said firebox, and means separateand apart from said screw operating at the juncture only of said sections for preventing impacting of the fuel at "said juncture and for assisting in advancing the fuel.

6. In combination, a boiler having a firebox, a fuel bin, a fuel feeding conduit system for transferring fuel from said bin and discharging it 'into said firebox comprising a conveying portion and an elevating-portion leading upwardly from said conveying portion exteriorly of said firebox, means within said conveying portion for advancing fuel through said conduit system, and additional fuel advancing means acting upon the fuel adjacent the juncture only of the conveying and elevating conduit "portions to prevent the impacting of the fuel and to assist in its conveyance.

7. In combination, a boiler having a firebox, a. fuel bin rearward of said boiler, a stoker comprising a transfer conduit for conducting fuel forwardly from said bin, a riser conduit exterior of said boiler leading forwardly from the delivery end of the transfer conduit to communicate with said firebox,

a distributor member associated with the upper end of said riser conduit, a screw within the first named conduit for advancing fuel therethrough and forcing it through said riser conduit onto said distributor memher, and a power actuated member separate from-said screw and located within the lower in advancing the fuel.

In testimony whereof I afiix my signature.

NATHAN QM. LOWER. 

